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Bartscher 70 Serie Manuel D'installation page 32

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Checking regulation of primary air
All the main burners are provided with primary air regulation. Checking must be done observing the
values shown in the air regulation column of the burner features table. To regulate the primary air,
proceed as illustrated in the following paragraphs.
ATTENTION! All the parts, protected and sealed by manufacturer may not be regulated by
the installer if not specifically indicated.
REGULATIONS AND SUBSTITUTION FOR USING DIFFERENT
GAS THAN THE TYPE PROVIDED FOR
Functioning with different gas than the type provided for
When changing to another type of gas it is necessary to substitute the nozzle in the main burners
and in the pilot burner, following the indications given in the following paragraphs. The type of
nozzle to install can be found in table 2 (pag. 9). The nozzles for the main burner, marked
with the relative diameter in hundredths, and the ones for the pilot burner, marked with a number,
can be found in a transparent packet attached to the instruction booklet.
When the conversion is completed, check the tightness of the pipe fittings and also that the ignition
and functioning of both pilot burner and main burner, at both minimum and maximum, are correct.
It may be necessary to check the output (power).
Substituting the burner nozzle (fig.10 – pag. 5)
To substitute the burner nozzle, it is necessary to open the door of the compartment. After doing
this, the screw which blocks the regulation of primary air must be loosened (1) and regulated until
completely open (2); the nozzle must be unscrewed (3) with a spanner and substituted with an
appropriate nozzle for the type of gas used, shown in table 2- (pag. 9). This nozzle must be
assembled, tightening well and it is then necessary to proceed by regulating the primary air, as
indicated in the next paragraph. When all this is done, replace the parts previously removed and
proceed to regulate the primary air, as indicated in the next paragraph.
Regulating the primary air of the burner (fig. 10 – pag. 5)
After having substituted the burner nozzle, it is necessary to proceed by regulating the primary air:
loosen the screw which fixes the regulating stirrup (1), bring value "x" to the correct measurement,
referring to table 2 (pag. 9) tighten the screw (2) and check the accuracy of value "x".
Substituting the By-Pass (fig. 11, 12 – pag. 5)
To substitute the by-pass, the knob (1) and the control panel (2) must be removed. When the work area has
been cleared, unscrew the by-pass (3) with a screwdriver and substitute it with the suitable for the type of
gas to be used, shown in table 2 (pag. 9). Reassemble the by-pass and tighten it well.
Put back the control panel and the knobs.
Pag. 14

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